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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 19 |
| 4 | 39 |
| 5 | 69 |
| 6 | 119 |
| 7 | 189 |
| 8 | 294 |
| 9 | 434 |
| 10 | 630 |
| 11 | 882 |
| 12 | 1218 |
| 13 | 1638 |
| 14 | 2178 |
| 15 | 2838 |
| 16 | 3663 |
| 17 | 4653 |
| 18 | 5863 |
| 19 | 7293 |
| 20 | 9009 |
| 21 | 11011 |
| 22 | 13377 |
| 23 | 16107 |
| 24 | 19292 |
| 25 | 22932 |
| 26 | 27132 |
| 27 | 31892 |
| 28 | 37332 |
| 29 | 43452 |
| 30 | 50388 |
| 31 | 58140 |
| 32 | 66861 |
| 33 | 76551 |
| 34 | 87381 |
| 35 | 99351 |
| 36 | 112651 |
| 37 | 127281 |
[1,3,9,19,39,69,119,189,294,434,630,882,1218,1638, 2178,2838,3663,4653,5863,7293,9009,11011,13377, 16107,19292,22932,27132,31892,37332,43452,50388, 58140,66861,76551,87381,99351,112651,127281] |